Now, a 240-million-year-old primitive turtle reveals a previously unknown stage in the evolution of the turtle body plan ... from above (dorsal view) and from the side (lateral view).

"No no." The officer then carefully picks the turtle up - placing one hand on each side of its body. At that point, the turtle bobs his head up and down, prompting the officer to offer a message ...

Just as adult turtles warm themselves in the midday Sun, turtle embryos 'bask' in their eggs by cosying up to the Sun-warmed side. Wei-Guo ... modify traits such as body size and sex, and hasten ...